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(No Model.)

J. A. ROBB.

SAW GUIDE- Patented May 4, 1886.

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N. PETERS. Phclwumo m hnr. Washmglnn. D. c.

UNITED STATES PATENT OFFICE.

JAMES A. none, OF SAN JOSE, cALIEonnIA.

SAW-GUIDE- SPECIFICATION forming part of Letters Patent No. 341,055, dated May 4,1886.

Application filed February 11, 1885. Serial No. 155.649.

To all whom it may concern:

Be it known that I, JAMES A. B01212, of San Jose, in the county of Santa Clara and State of California, have invented certain new and useful Improvements in Saw-Guides; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawlugs.

My invention relates to improvements in saw-guides for circular or other saws; and the invention consists in the construction and combination of parts hereinafter described, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is the plan or top view of the device in section. Fig. 2 is a cross-section on line x m, Fig. 1. Fig. 3 shows the fixed and movable jaw in detail. Fig. 4 is a front view in elevation. Fig. 5 is a view from the righthand side of Fig. 4.

A is a plate or stand of cast-iron or other suitable material, with two bearings, a a, and a box, A, with a head, A fastened with tapbolts, to prevent the sawdust from getting into the gears. The stand is to be fastened to the frame of the saw by screws through holes a.

B is an arm of cast or wrought iron, brass, or other suitable material, with a thread or screw cut on the shaft. On the other end of the shaft is an arm, H, at right angles to it, of sufficient strength to hold the pressure of the saw. On the inside of this arm, near the end, is a dovetailed notch, to receive the bearingpin J, lengthwise of the grain of the material used, so that the side instead of the end of the grain of the material may come to the side of the saw.

0 is a miter-gear on the end of the shaft B, fitted with an internal thread engaging with the feedthread B on the shaft B, and on the hub of said miter-gear is turned a j ournal-bearing to work in thebox a, leaving on each end of the hub of the gear a shoulder to prevent endplay. Another finer thread, (Z, is cut on this shaft B, and a socket-nut, F, fitted to the screw that clasps the flange on the sleeve-arm D, to move or slide it forward or back to increase or diminish the distance of the wood, ivory, or other blocks from the saw against which they (No model.)

run. A lock-nut, G, is turned up against the socket nut F and holds it in position.

E is a spline fitted with adovetail to the shaft B, to prevent the sleeve-arm D from rotating on the shaft 13.

D is a sleeve-arm of cast or wrought iron or brass, with the inside bored out or babbitted' to fit the shaft B, with a flange or hub, D, on one end to connect to the socket-nut F. By turning the nut F to the right it moves the sleeve-arm D toward the plate or blade of the saw,and by turning it to the left it removes it from the saw plate or blade.

On the end of the arm D, on the side toward the saw, is a dovetailed notch, I, a little wider on the top than on the bottom, thus forming a wedge for holding a piece of hickory, oak, or other hard wood, horn, ivory, or other material,J, which is fitted into the dovetail length: wise of the grain of material used, so that the side instead of the end of the grain of the material used may come to the side of the saw.

On the end of the arm D opposite the dovetailed notch is cast or forged aprojection, D", parallel to the sleeve to rest on the plate A, to prevent the arm D and the shaft B from rotating in the boxes, and to hold it in position to the saw.

Through the sawdust-box A is a shaft, M, and on this shaft is keyed a miter or bevel gear to work the gear on the shaft B. The end of the shaft comes out under the front roller 0f the machine, where the sawyerstands, so that he may reach it without moving from his position. On the end of this shaft is placed a hand-wheel, 11*, by the means of which the Sawyer may force the saw into or out of the log by simply turning the wheel either to the right or to the left.

The saw-guide may be changed from a right to a left hand mill by taking the miter-gear from the shaft and putting the shaft in on the opposite side.

In my improvement, there being a round shaft, it is only required to turn the jaws back, release the saw, so it may be removed from the arbor, another saw put on, and, by turning the jaws back again, it is ready for work with out moving nut, key, bolt, or wedge.

Having thus described my inventiomwhat I claim, and desire to secure by Letters Patent, 1s

1. The combination, with a suitable frame or box having bearings, as a a, of the adjustable arms B D, one of which has a hollow cylinder, and the other a shaft splined in said cylinder, having the surfaces J J, and mechanism, substantially as described, for moving and setting the said arms and surfaces laterally to and from each other, one arm, D, having means for looking or securing it to the other arm, whereby the two surfaces J J, when set against and holding the saw between them, can be moved in or out together without changing their relation. 7

2. In an adjustable sawguide, the combination of the arm D, having the hollow cylinder, as described, the arm B, having the shaft splined in the cylinder of part D, the screwthreads at and nuts F G, for locking the two arms together, the feed-screw B", the revolving nut or hub with internal threads to take this feed-screw, the shaft M, geared into this threaded nut to rotate it, and the hand-wheel to turn the shaft, substantially as described.

3. In a saw'guide, the combination, with the parts B and D, carrying the bearing-pieces for the saw, of a gear secured upon the part B, the hand-shaft M, having a gear secured upon it, meshing into gear on part B, the box A surrounding the said gears, for the purpose set forth, and the removable cover A, placed upon the top of box A substantially as and for the purpose set forth.

4. In an adjustable saw-guide, an arm with a hollow shaft portion capable of lateral move ment in and out of a bearing, a second arm sliding through and independently of the hollow shaft, the right-angle extension, the inner adjacent faces of which areprovided with bearing-surfaces J J, to bear against the saw, spline Witnesses:

I. R. BEARD, GHAs. D. WHEAT.

JAMES A. ROBB. 

